Synthesis, Molecular Structure, Conformational Analysis, and Chemical Properties of Silicon-Containing Derivatives of Quinolizidine
作者:Nataliya F. Lazareva、Bagrat A. Shainyan、Uwe Schilde、Nina N. Chipanina、Larisa P. Oznobikhina、Alexander I. Albanov、Erich Kleinpeter
DOI:10.1021/jo202658n
日期:2012.3.2
7-tetramethylhexahydro-1H-[1,4,2]oxazasilino[4,5-d][1,4,2]oxazasilin-9a-yl)methanol 3 was synthesized. X-ray diffraction analysis confirmed the trans configuration and low temperature NMR spectroscopy both the flexibility (barrier of interconversion 5.8 kcal mol–1) and the conformational equilibrium (chair–chair and chair–twist conformers) of the compound. The relative stability of the different isomers/conformers
的喹嗪3,3,7,7-tetramethylhexahydro-1 A硅类似物ħ - [1,4,2] oxazasilino [4,5- d ] [1,4,2] oxazasilin基-9a-基)甲醇3合成。X射线衍射分析证实了化合物的反式构型和低温NMR光谱学既具有灵活性(互穿屏障5.8 kcal mol –1),又具有构象平衡(椅子-椅子和椅子-扭曲结构)。同样在MP2 / 6-311G(d,p)的理论水平上计算出3的不同异构体/构象异构体的相对稳定性。3中的分子内和分子间氢键在不同极性的溶剂中研究了自由分子和自缔合分子之间的适当平衡。可以得到3的N-甲基季铵盐和O-三甲基甲硅烷基衍生物,并确定它们的结构。